Shear Strength of Reinforced Limestone Aggregate Concrete Beams

Nakarai, Kenichiro; Ogawa, Yuko; Kawai, Kenji; Satō, Ryōichi

doi:10.14359/51689725

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…Many experimental and numerical studies have been conducted on the influence of drying and the resultant 1 shrinkage on RC structural performance. For example, studies exist on the effect of shrinkage due to self-strain stress without considering concrete alternation (Umemura 1955;Aoyama 1958), the time dependent change in the stiffness of beams and slabs considering shrinkage, creep, and macroscopic cracks (Al-Deen et al 2011;Gilbert 2013), tensile experiments of RC prisms (Bischoff 2001;Ema et al 2002), the bending crack strength and ultimate bending strength of columns and beams (Iso et al 1993;Tanimura et al 2007;Lampropoulos and Dritsos 2011;Gribniak et al 2013), and the shear strength (Sato and Kawakane 2008;Mitani et al 2011;Nakarai et al 2016;Nakarai et al 2017). In tensile experiments of RC prisms, it was observed that drying shrinkage brought about a reduction in the apparent cracking load and made the softening steep (Gilbert 2013).…”

Section: Introductionmentioning

confidence: 99%

Impact of Drying on Structural Performance of Reinforced Concrete Shear Walls

Sasano

Maruyama

Nakamura

et al. 2018

ACT

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The aim of this study is to experimentally investigate the effect of drying on a shear wall, and to clarify the mechanism of the changes in the structural performance due to drying. Two sufficiently hydrated wall specimens are prepared. Then, one is loaded without drying, while the other is tested after sufficient drying until the shrinkage of concrete reaches an equilibrium state. The results show a reduction in the initial stiffness and little change in the ultimate shear strength in the dry specimen, in spite of an increase in the compressive strength. Reproduction numerical analysis using Rigid Body Spring-network Model (RBSM) coupled with a truss network model for moisture transport is conducted, and an acceptable agreement is confirmed in the ultimate strength and the crack patterns. From the numerical results, it is revealed that two factors are balanced in the ultimate shear strength after drying in this experiment: 1) an increase in the compressive strength due to aging (material scale), and 2) a strength reduction due to lateral strain, which is evaluated using the formula suggested by Vecchio and Collins (1986) (member scale). This indicates that the wall reinforcement ratio and concrete shrinkage have the influence on the ultimate strength through increasing/decreasing the number of cracks and the crack width.Ph.D student,

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